Oracle Blog

My posts about WebLogic Server

Monday Oct 07, 2013

The root cause of a classloading issue is very simple. Either the required library is not being loaded by an application deployed in WLS or there is an incorrect invocation in an application deployed in WLS.

However, these errors can be very difficult to troubleshoot because they usually depend on customizations like: 1. OS Libraries. 2. Customized WebLogic Server classpath. 3. Application classpath. 4. Application Upgrade/Upgrade of an Oracle Product. 5. The issue occurs randomly.

There are several classloading issues you might be hitting, e.g: ClassCastException, NoClassDefFoundError, ClassNotFoundException, NoSuchMethodError.

About

My name is Luz Mestre. I work as Principal Technical Support Engineer at Oracle Support.
I'll post here the most interesting challenges I have in my daily work.
The views expressed on this blog are my own and do not necessarily reflect the views of Oracle.